Platform-motor for phonographs, &amp;c.



No. 680,060. Patented Aug. 6, 190i.

W. H. MILLER.

PLATFORM MOTOR FOR PHONOGRAPHS, 81.0.

(Application filed Apr. 26, 1898.)

4 Sheets-Sheet I.

(No ModelJ I INVENTORQ BY mu 3 WITNESSES! 4 /Z flab/4V? ATTORNEYS.

No. 680,060. Patented Aug. 6, I90l. W. H. MILLER.

PLATFORM MOTOR FOR PHONOGRAPHS, 8L0.

(Applicaflon filed Apr. 26, l898 4 SheetsS heet 2.

(No Model.)

INVENTOR:

WITNESSES VJ. dW W .aLlm-m ATTORNEYS.

Tn: mums PETERS co. wnrmpu'mu, wasnmumn, n. c.

No. 680,060. Patented Aug. 6, l90l.

' W. H. MILLER.

PLATFORM MOTOR FOB PHONUGRAPHS, 81.0.

(Application filed Apr. 26, 1898.) (Na Model.) 4 Shegts Shaet 3.

WITNESSES: INVENTOR:

m BY Wm ATTORNEYS.

rm: NORms PETERS co PHOTO-LITNO., WASHYNGTON, u c

No. 680,060. Patented Aug. 6, l90l.'

W. H. MILLER.

PLATFORM MOTOR FOB PHONDGRAPHS; 8w.

(Applicafcion filed Apr. 26, 1898.) I (No mm.) 4 sheets-sheet 4.

WITNESSES: mvgmoa:

M m. 6W BY M y@ ATTORNEYS.

rm: mamas PETERS co. Pnoruuma. wnsumcrmu. n. c.

' U ITED STATES PATENT OFFICE.

WALTER H. MILLER, or ORANGE, NE JERSEY.

PLATFORM-MOTOR FOR PHONOGRAPHS, 80C.

SPECIFICATION forming part of Letters Patent 0. 680,060, dated August 6,1901.

Application filed April 26, 1898. Serial No. 678,835. (No model.)

To all whom, it may concern:

Be it known that. I, WALTER H. MILLER,

a citizen of the United States, residing atv Orange, in the county ofEssex and State of New Jersey, have invented certain new and usefulImprovements in Platform-Motors for Phonographs, &c.; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as willenable others skilled in the art towhichit'appertains to make and use the same, reference being had to theaccompanying drawings, and to characters of reference marked thereon,which form a part of this specification.

This invention relates to that class of motors in which the weight ofthe human body is utilized as the motive force.

The improvement is applicable more especially to phonographs, althoughit may be ience involved in changing the position of the body toaccommodate it to the change in the position of said platform.

Other advantages and results may be referred to hereinafter inconnection with the description of the working parts.

The invention consists in the improved motor for phonographs, &c., andin the arrangements and combinations of parts of the same,

all substantially as will be hereinafter set forth and finally embracedin the clauses of the claim.

Referring to the accompanying drawings, in which like characters ofreference indicate corresponding parts in each of the several views,Figure 1 is a front elevation of my improved motor applied to aphonograph, the front portion of the inclosiug case being removed tomore fully show the operating mechanism. Fig. 2 is a side elevation ofthe same. Fig. 3 is a detail side view showing certain rear connectionswith a platform-supporting lever. Fig. 4 is a detail plan of the same.Figs. 5 and 6 are detail views of a certain catch or detent lever, andFigs. 7 and 8 are detail views of another lever connected therewith.Fig. 9 is a detail side view of certain holding mechanisms forpreventing the train of motor-gearing from operating. Fig. lOis a frontview of certain releasing mechanisms, and Fig. 11 is a plan of therearend of the platform-lever.

In said drawings, a indicates a suitable case'having at its lower partan extension which is open at the front to permit the d0wnward movementof a horizontal platform I), upon which the person whose weight givesmotion to the machine stands whilelisteningto the sound issuing from thephonograph. The said platform I) is vertically movable while maintainingits horizontal position and has no material pivotal movement by which itwould be caused to pitch or incline backward or forward to theinconvenience of the listener. While in the construction shown saidplatform has a slight forward movement as it lowers, this is notsuflicient in degree to be inconvenient, if at all noticeable, and forall practical purposes the movement is vertical and is so denominatedherein. platform I) is supported at its forward end by a lever or leversc, fulcrumed at d upon suitable bearings a, formed at the base of thecase, the said bearings being preferably provided with balls, by meansof which friction is reduced, the ball-bearings being applied in anysuitable manner. At its rear end the platform is supported byconnections with said lever, as hereinafter described. The lever 0preferably comprises a shaft, to which are secured threeupwardly-inclined arms, of which the forward arms 0 extend to the frontpart of the platform 1) near the opposite ends thereof and the rear arm0. extends rearward for purposes hereinafter specified. The saidlever-arms c" are pivoted, as atf, to the under side of the saidplatform. Suitable ears or extensions f are provided to receive thesame. A regulating screw or screws f may be employed to limit thedownward movement of said arms. The rear edge of the platform lies backof the vertical front face or board a of the case, as indicated in Fig.2,and is supported by a chain orflexible connection d of sufficientstrength and little or no extensibility, which is secured to saidplatform The said IOO ' when the parts arein the relation shown at'about midway between the ends thereof and j. Said door serves to closethe opening or aperture formed by the descending platform, supplementingthe front plate of the case and preventing the entrance of dust or dirtand improper access to the working parts within.

The chain (1 and the-lever 0 thus cooperatein holding the platform at ahorizontal position and inasmuch as the front and rear arms of the leverare of about equal length the chain at its connection with the platformlowers with the same rate of speed as the forward arm of thelever'lowers, and thus the horizontal position of the platform ismaintained as it descends under the weightof the listener.

Suitable means are provided within the casing for holding the platformup to its high est position when not properly in use or for preventingthe downward'movement of said platform prior to its being released bythe insertion of a coin, the price of a hearing at the machine, and therelease of the holding mechanism. Means are provided for releasing saidholding devices and permitting the insertion of the coin into themachine and guiding and controlling its movements to the releasingdevices. ranged a bed-plate or frame K, which is preferably removablefrom the casing, said frame being provided with inward ly-projectingears or flanges k k', as shown in'Figs. 1 and 2, which ears or flangesafiord bearings for a series of arbors or shafts and other appliances.of a train of mechanism controlled by the downward movements of theplatform.

From the idle pulley h, Fig. 2, the chain (1 extends downward to thelever-arm c, and from thence it passes under the sprocketwheel Z,arranged on the arbor m, and i'm parting motion to said sprocket-wheeland the parts in train therewith. From said sprocketwheel said chainextends upward and connects with a cord of twisted wire 61, which latterpasses over a pulley n, arranged near the top of the machine, and fromthence downward to a Weight 0 for counterbalancing the weight of theplatform. Of course it will be understood that the chain can easily'becontinued over the pulley n' and down to the weight.

I prefer to employ an idle pulley n, Fig. 2,

a point below the phonograph to press said belt or chain cl back out ofengagement or \Vithin said casing is armally in an elevated position.

cylinder to permit a slow outflow of air, so 7 that the downwardprogress of said weight when the platform is free of the weight of thelistener is retarded and there will be no sudden movements detrimentalto the machine and productive of noise. The air cush ion also preventsthe platform from tripping or throwing the auditor as he steps off because of a quick upward action when said platform is relieved of weight.

The actions of the air-cushion and plat form when the parts areconstructed as de scribed are thus extended over a considerable periodof time, beginning immediately upon the stepping off of the listener andcontinuing during the whole period of descent of the weight and thereturn of the platform to its elevated position. Thus the raising of theplatform is slow and regular and without any jarring action, as abovedescribed.

To maintain the desired horizontal position of the platform during itsdescent, l connect the rear end of the arm a of the lever c to the lowerrear end of the chain d,as shown in Fig. 2, by which means the chain andthe lever are compelled to move together simultaneously and the distanceof movement of the chain will be substantially equal to the distance ofmovement of the forward end of the lever c where it connects to theplatform, the arms of said lever being substantially of the same length,as above indicated, or the point of connection of the platform with onearm of the lever and of the chain .Withthe other arm of the lever beingof uniform distance from the fulcrumal bearing of the lever, as will beunderstood. The chain d in the construction shown is discontinuous atthe arm 0 or the said arm 0 forms one of the links thereof; but it isunderstood that other means may be employed for extending themaintaining its horizontal relation other than these specificallydescribed.

It will be understood from the above description that the weight 19,acting both on the chain and lever, holds the platform nor- To lock theplatform in this elevated position and prevent the machine being workedprior to the insertion of a coin, I provide a detent or stop mechanismof any suitable construction. The construction shown and described isthe one I prefer to employ and desire particularly to claim. Saidpreferred construction includes a stop-bar q for operating a pawl s estlimit of movement.

and preventing the working parts from moving. Said bar q is engaged nearits lower end by a friction-clip attached to the rear end or arm 0 ofthe lever c, the said bar q extending downward between the spring q" andthe extension q formed or secured at the rear end of said arm 0, as willbe understood upon reference to Figs. 3, 9,and 11. By this constructionthe arm a of the lever c is movable independent of the stop-bar q and iscapableof clutching and operating said bar q to effect an engagement ofthe pawl s with the ratchet-wheel i when said pawl is free to be thusoperated.

When the platform lowers and the lever c lifts the bar q longitudinally,the pawl-lever s, Fig. 9, is turned on its fulcrum and the pawl-tooth ris thrown out of engagement with the ratchet -wheelt. In the reversemovement of the platform the pawl is brought into holding relation withthe said ratchetwheel 25 with an elastic pressure due to the spring 0",Fig. 9, and the devices in train with said ratchet-wheel are preventedfrom rotation, the friction clip or clutch attached to the lever c ispermitted to slide on the bar q, the propelling power overcoming theclutchfriction of the contact, and the said lever 0 thus continues itsmovement until the up ward-moving platform I) arrives at its high- Bythis construction and arrangement of parts it will be apparent that themachineis locked by the engagement of the locking-pawl with the Wheel tof the train of gearing immediately upon the removal of the weight ofthe listener from the platform and the beginning of the return movementimpelled by the weight 0. Said platform is returned to its initialposition, even though the auditor has not waited to listen to the fullcomplement of music paid for and the speaker of the phonograph has nottraversed the full length of the cylinder.

The ratchet or gear wheel 15, as above indicated, is in train with theseries of gear or cog wheels Z, Z F, to Z, by means of which the motionof the weighted platform and its supporting-chain is transmitted to.thephonograph and governor Z", the wheel or pinion L" transmitting thepower to the governor in any suitable manner. The pawllever 8, connectedto the upper end of the stop-rod q, is fulcrumed at 8 upon the frame ofthe machine or one of the flanges 10'' thereof, and at its end oppositethat at which it is pivotally connected to said rod (1 it is providedwith the pawl comprising a spring rand the pawltooth r, Fig. 9, as abovementioned. When said rod q is forced upward by the frictionclip abovedescribed, upon the descent of the platform, the said tooth 0" will bethrown out of engagement with the wheel 15, and the said wheel 15 andthe cogwheels Z Z Z &c., above referred to, in train therewith will befree to revolve and to transmit motion'from the descending platform tothe phonograph or other mechanism to be operated, as will be saidcog-wheels may be varied at will.

The lower extremity of the stop-rod q is somewhat reduced in diameter,so that at the initial point of release the frictionclip will not behard thereon, thus reducing the amount of power required to secure therelease of the pawl 3' under the weight of the coin. This reduction ofthe rod is, however, but slight and not observable in the drawings andmay be omitted in the construction. To release the stop rod or bar andits pawl from .holding engagement with the train of power transmittingdevices, I have employed mechanism controlled by the weight of a coininserted in the machine as the price of a hearing.

Any releasing device may be employed; but the device preferred 1 haveshown and I will now proceed to describe.

Upon the mounting of the platform by the auditor and the insertion ofthe coin within the slot of the inclosing case a in any 0rdi-' narymanner the coin is directed by means of a curved guideway u to atrip-lever '12, referring especially to Fig. 1, the point of engagementof said lever by the coin being somewhat cup-shaped to receive the coinfrom the guideway and after the descent of one arm '0 of the trip-leverto direct it into the coin-receptacle w, the downward movements of saidarm 2; being limited by a suitable stop. (Not shown.) The said lever 'uis held in a normal position to receive the coin from the slideway by aweight 0], Fig. 1, arranged on a third arm of said lever, or a springmay be employed for the same purpose. The arm 12 of said lever o servesas a stop or keeper for another lever 3, loosely fulcrumed at one end,as at 4, upon the forward edge of one of the flanges of the frame. Thisloose lever 3 crosses the plane of action of the pawl-lever s, so as tolie in contact with the upper edge of the said pawl-lever s, as shown inFig. 9. Thus when said arm 0" is in holding relation to said lever 3 thelatter is held transversely across the plane of action of the lever sand serves as a stop or holding device for the same. The free end ofsaid loose lever 3 is arranged within a guideway 4, Fig. 2, having aslot 5, adapted to contain and guide the said free end of the lever 3.This slot 5 is so formed and related in position to the lever 3 and thearm r' of the lever '0 that it will direct or guide the loose lever 3,when released and pushed up by the pawl-lever s, obliquely upward andoutward from under the lifted downwardly-extending end of the arm '0'.Conversely, when the loose lever 3 is permitted to gravitate by thedownward movement of the rod q and pawl-lever arm connected thereto itwill be guided to a position beneath the end of the arm 71, and thuslocked again, all as will be understood.

Upon the frame of the machine, contiguous to the pawl-lever s, isfulcrumed, as at 6, Fig. 10, a walking-beam 7, which is linked by therod or link 8 to the pawl-lever s. The op posite end of the walking-beam7 is connected by a rod 9 to a spring-lever 10, fulcrumed at 11 upon abracket or stud 12, connected to or formed upon the bottom of the casingof the machine. Said spring-lever comprises, preferably, an arm of rigidmetal 13, to which is fastened a flat steel spring 14:. The lowerextremityof the said rod 8 is threaded and enters a correspondinglythreaded perforation in the rigid portion 13 of the said spring-lever10. The spring portion 14 of said spring-lever is held to the rigidportion 13 by any suitable means,and the said spring portion extendsforward to a point of engagement with the leverarm 0. When the said arma is brought to its lowest limit of movement, it engages the end of saidspring-arm 10 and depresses the same against the elasticity of thespring portion 14:. The result of this is to cause a tension upon therod 9, the connecting rod or link 8, and

the pawl-lever s, which tends to throw the pawl-tooth r from holdingengagement with the cog or gear wheel 25. Said pawl-lever is, however,held from moving by the lever 3 and trip-lever o, as above described. Assoon as a coin acts upon the trip-lever o, thereby releasing the looselever 3, the spring-lever 10 resumes its normal straight position byVirtue of its elasticity, producing a downward draft on the rod 9 and anupward draft on the connecting-rod 8, and thus throwing the pawl tooth rfrom engagement with the cog or gear Wheel t and sliding the stop-rod qupward in relation to the friction-clip against the fric-x tion thereof.The weight of the coin thus eifects a train of movement by which thepawltooth r is Withdrawn from holding relation to the train oftransmitting gear-Wheels as soon as a coin is inserted in the machineand without waiting for the upward movement of the arm 0 to begin.

To facilitate the starting of the machine, so as to secure a movementmore immediate than the weight of the body alone acting through thetrain of devices would produce,l have provided a push-pawl 35, Figs. 3and 4, which is adapted to engage one of the wheels of the train ofpower-transmitting gearing to facilitate a forward operation thereof.Said push-pawl may engage any one of the said wheels to secure thedesired operation. The said pushpawl is hinged at one arm 361 of abell-crank lever 36, fastened upon a shaft 37', said arm 361 extendingto a point adjacent to the cogwheel and the push-pawl being held inoperative position in a straight line with the said arm by a spring 351,which permits the cogs of the wheel to pass said pawl in their forwardmotion, the said hinge-joint permitting flexion of the pawl in only theone direction from its normal position in straight line with the arm361. To another arm 362 of'the said bell-crank lever 36 is attached apower-storage spring 38, in which power may be stored as the platformascends andthe lever-arm c descends. To effect this storage of power,the bell-crank lever 36 has an outwardly-extending third arm 363, and ata suitable point on the lever-arm .c' is pivoted a catch-piece 40,hooked at its upper end, as shown in Figs. 3 and 4. Upon the elevationof the lever-arm c to or nearly toits highest point the said catch-piece40 engages with its upper hooked end the third arm 363 of the bell-cranklever 36, being held from slipping therefrom by the spring 39 acting onthe projection 401 of the catch-piece. It will thus be seen that as thelever-arm c is depressed by the power of the counterbalancing-weight 0it pulls down with it the third arm 363 of the bell-crank lever 36, thusturning the said bell-crank lever on its fulcrum and producing a tensionin the spring 38. Near the lower limit of movement of the lever-arm cthe said projection 401 strikes an adjustable stop t5, the catch 40 isreleased from the arm 41 of said lever 36, and the spring 38 becomesfree to exert its power upon said bell-crank lever to cause the pawl 35to push upon the gearwheel. This power becomes effective immediatelyupon the entrance of a coin and the consequent releasing of themachinery,

as has been described, and is expended in pushing the gear-wheel of thetrain to facilitate initial movements.

By the construction thus described the pro posed listener at the machineis enabled to step upon the level platform, insert the coin to releasethe mechanisms, and immediately listen to the sound issuing from saidmachine and during such listening maintain himself in easy positionwithout any inconvenience or disturbance of his equilibrium or poise dueto a change in inclination of the platform.

Adjacent to the sprocket-wheel Z, loose upon the shaft m, isa'ratchet-wheel 41, keyed to said shaft, said ratchet-wheel beingengaged by pawls 42 42, arranged on the side of the sprocket-wheel l andwhich produce rotation of the shaft and gear-wheels thereon during theupward movement of the lever-arm 0',

but allow said shaft to remain stationary during the-downward movementof the lever-arm, as is common in machinery.

Havingfthus described the invention, what I claim as new is- 7 1. Thecombination with the horizontal platform, of the lever fulcrumed belowsaid platform and having upwardly extending arms, one of which ispivotally connect-ed to the front of said platform and the other extendsrearward thereof, an idle pulley arranged above'the rear of saidplatform and a chain connected to the rear of the platform and extendingup therefrom over said pulley and thence to the rearwardly-extending armof the lever to which latter said chain is connected, substantially asset forth.

2. The combination with the horizontal platform, of the lever, fulcrumedbelow said platform and having upwardlyextending arms, one of which isconnected to the front of said platform, the other extending rearwardthereof, an idle pulley arranged above the rear of the platform and achain attached to the rear of the platform and extending up therefromover said pulley and thence to the rearwardlyextending arm of the leverto which it is attached, and a counterbalanceweight and chain, thelatter being so attached to the rearwardly-extending arm of the lever asto raise the platform when the weight of the occupant of the platform isremoved, substantially as set forth.

3. In a motor, thecombination with a horizontal platform, of a leverhaving upwardly-' inclined arms extending toward the front of theplatform and rearward thereof and directly connected to the platform atthe front, a chain or flexible connection attached to said platform atthe rear and supporting said platform thereat, a counterbalance-weightso connected to the lever as to raise the platform, the rear extensionof the lever having a friction-spring q, a bar q, engaged by saidspring, and detent or stop mechanism connected to said bar,substantially as set forth.

4. In a motor, the combination with a horizontal platform, of a leverhaving arms a, a, one of which is connected to and supports theplatform, an idle pulley, a chain or flexible connection connected tothe platform and supporting the same at the side or end opposite thatsupported by said lever, said chain being arranged over the pulley andconnected to the other arm of the lever, substantially as set forth.

5. In a motor, the combination with a platform and supporting-lever, ofpower-transmitting gearing including a sprocket-wheel Z, a chainengaging said sprocket-wheel and imparting motion thereto, acounterbalanceweight attached at one end to said chain, the other end ofthe chain being attached to the platform-supporting lever, the weightbeing supported in such a manner as to lower one.

end of said lever to raise the other end supporting said platform, saidlever having upwardly-inclined oppositely-extending arms, one of whichreceives said chain and the other supports the platform, substantiallyas set forth.

6. In a motor, the combination with a platform, of a train ofpower-transmitting gearing including a sprocket-wheel, a lever havingoppositely-inclined arms, the forward one of which supports theplatform, a chain attached to the rearward arm of said lever andextending downward therefrom around the said sprocket-wheel to impartmotion thereto, and carrying a counterbalance-weight at its end, thechain also extending beyond its point of attach ment to the lever intoconnection with the platform and supporting the same at the sideopposite to that supported by the lever, substantially as set forth.

7. In a motor, the combination with the platform and the train ofpower-transmitting wheels includinga sprocket-wheel Z, of aflexibleconnection having a weight at one end sprocket-wheel and over a secondidle pol icy, and means cooperating with said flexible connection insupporting said platform and maintaining the same in a horizontalposition as the said platform moves vertically, substantially as setforth.

8. In a motor, the combination with the platform and lever having an arm0, of a friction-clip attached to said arm, a rod or bar q, arranged insaid clip, and detent means operated by said rod, substantially as setforth.

9. In a motor, the combination with the platform and-lever operatedthereby, of a friction-clip and a detent rod or bar held by said clip,said clip permitting independence of movement between the lever and rodor bar, and detent mechanism engaged by said rod or bar, substantiallyas set forth.

10. The combination with the platform and lever, c, operated thereby, atrain of gearing and connections with the lever for transmitting powertherefrom to said gearing,of a friction-spring q connected with saidlever, a rod or bar q, operated by said lever and spring, a lever s,operated by said rod, and a pawl operated by said lever and adapted toengage one of the train of gear-wheels, substantially as set forth.

11. The combination with a platform and lever, c, of a train ofpower-transmitting gearing, a friction-clip attached to the lever, a rodor bar in frictional contact with said clip, a levers, connected to saidrod or bar, a pawl 3, connected to said lever and adapted to engage thepowertransmitting gearing, a

walking-beam, rods 8 and 9, one of which and adapted to move therewith,and a friction clutch, or clip adapted to clutch by friction, arrangedon the other arm of said lever and engaging the said rod or barbutcapable of moving independent thereof, substantially as set forth.

13. The combination of a train of gearing, a lever c-having a frictionclutch or clip, a detent adapted to engage said gearing, and a bar orrod connected to said detent and en'- gaged by said friction-clip,substantially as set forth.

1%. The combination with the train of motor-gearing, of a platform-lever0, having a friction-clip, a pawl adapted to engage the gearing toprevent operation of said gearing,

and a rod q, extending into frictional relation to said clip and adaptedto operate said pawl, substantially as set forth.

15. The combination with the motor-gearing, of a platform andcounterbalance therefor, of a detent to prevent operation of saidgearing, a friction device in connection with the platform and adaptedto frictionally clutch a part connected to said detent to cause thelatter to engage and stop said gearing upon the ascent of the platform,and releasing means adapted to disengage the detent from engagement withthe gearing preliminary to the descent of said platform, substantiallyas set forth.

16. The combination with the motor-gearing, of a platform and acounterbalance therefor, a lever 8, having a pawl for stopping theoperation of the motor, a connecting rod or bar attached to said levers, a lever 0, having a friction-clip for operating said connecting rodor bar, and means connecting said platform and lever c, substantially asset forth.

17. The combination with a moving platform and means for transmittingmotion from said platform to the device to be operated, of afriction-clip in connection with the platform, a detent having a rod orbar engaged by said clip, said detent being adapted to engage the saidpower-transmitting means upon the ascent of the platform, and means forraising said platform, substantially as set forth.

18. The combination with a moving plat form and means for transmittingmotion from said platform to the device to be operated, ofafriction-clipin connection with the platform, a detent adapted toengage the power-transmitting means and having a rod engaging saidfriction-clip, a locking-lever for said detent, and means for releasingsaid deten t, substantially as set forth.

19. In a motor, the combination with a vertically-movable platform,means for locking said platform in its elevated position and forreleasing the same, a lever connected at its forward arm to saidplatform and operated thereby, and power-transmitting gearing, of apower-storage spring connected to the rear arm of said lever and broughtunder tension by the ascent of the platform, and means for releasingsaid spring and transmitting its en ergy to the said gearing,substantially as set forth.

g 20, The combination with the power-transmittinggearing, of theplatform, lever 0, pushpawl 35, a crank-lever supporting said pawl,- astorage-spring 38, adapted-to expend its power upon said gearingdirectlyupon the release of said platform to aid in effecting animmediate operation of the motor upon such release, means for lockingthe platform in its elevated position and releasing means, substantiallyas set forth.

21. In a motor, the combination with the platform and itssupporting-lever 0, having an arm 0', and a catch 40, attached thereto,of the spring 38,1ever 36, and push-pawl, and a bearing 45, adapted tothrow said catch 40 from said lever when the lever-arm c, is at or nearits lower limit of movement, substantially as set forth.

22. In a motor, the combination with the platform and itssupporting-lever and chain and connections, of a train ofpower-transmitting wheels including the sprocket-wheel l, having aratchet-and-pawl connection, said pawl causing the sprocket-Wheel toturn with it during the operation of the motor and to turn freely in theopposite direction, a pushing-lever stationed near saidsupporting-lever, a catch 40, arranged on said supportinglever andadapted to engage said pushing-lever, and releasing means adapted torelease said catch from the pnshing lever, substantially as set forth.

23. In a motor having a train of power transmitting gearing, of amovable platform and connections," and a detent or stopping devicecontrolled by said platform, substantially as set forth.

24. In a motor, the combination with the motor transmitting devices, ofa moving plat form in connection with said transmitting devices, a stopor detent controlled by said platform to effect an engagement of saidstop or detent with said transmitting devices to lock the same againstmovement, and means permitting the risingand falling of said plat-Witnesses:

CHARLES H. PELL, G. B. PITNEY.

